Later Hanafi jurists treat the Muzdalifah standing as wajib, with its valid time running from true dawn until sunrise on 10 Dhu al-Hijjah. Presence for even a brief interval fulfills the minimum, while remaining longer for remembrance and dua is the recommended pattern.
This is juristic elaboration of al-Quduri’s sentence, not a verbatim quotation. Legitimate excuses affect the ruling for departing earlier.